I'm doing a 1.8t swap and I don't know what would be better


should I make a 2.5" downpipe and later buy a 2.5" exhaust

or

should I make a 3" downpipe and than use a 2.5" exhaust

or do a 3" downpipe and than get a custom 3" exhaust

or do a 3" downpipe and use a 2.5" exhaust?


sorry for the stupid question but the vwvortex doesn't have the tech info like honda-tech does